真乄科技業的頂尖投資團隊

富士膠片公司開發了一種薄膜，可以使用的隔膜（振動板）的揚聲器，並宣布在2013年納米技術，運行從1月30日至2013年2月1日，在東京的一個貿易展。

通過使用隔膜，這富士調用“敲打”，變得可以實現，可以彎曲和折疊的揚聲器。在本次展會上，公司展出了超薄喇叭，伸縮喇叭和日本歌迷（意義上的）般的揚聲器。

為了實現可彎曲的膜片，由軟質材料是必需的。但是，由於軟質材料吸收振動，它是很難保證在同一時間的柔軟性和高的聲學特性。這一次，富士確保他們兩個通過使用硬化的粘彈性聚合物，在可聽範圍（20Hz至20kHz）和軟化用於彎曲它由手（幾個赫茲）的範圍內。

富士混合的粘彈性聚合物，使壓電陶瓷的壓電複合材料，並與保護層與電極夾持後打包。當將電壓施加到電極上，在壓電陶瓷振動，和作為膜片的粘彈性聚合物的功能。

通過用手彎曲膜中產生的應變能釋放熱量，防止裂紋，剝離等，在可聽範圍內，膜保持適合的隔膜的內部損耗。粘彈性聚合物材料的基礎上，富士膠片開發在過去開發的。

Fujifilm Corp developed a film that can be use as the diaphragm (vibrating plate) of a speaker and unveiled it at nano tech 2013, a trade show that runs from Jan 30 to Feb 1, 2013, in Tokyo.

By using the diaphragm, which Fujifilm calls "Beat," it becomes possible to realize a speaker that can be bent and folded. At the trade show, the company exhibited a slim speaker, retractable speaker and Japanese fan (sensu)-like speaker.

To realize a bendable diaphragm, a soft material is required. However, because soft materials absorb vibration, it is difficult to ensure a flexibility and high acoustic characteristics at the same time. This time, Fujifilm ensured both of them by using a viscoelastic polymer that hardens in the audible range (20Hz to 20kHz) and softens in the range for bending it by hand (several hertz).

Fujifilm mixed the viscoelastic polymer with piezoelectric ceramics to make a piezoelectric composite and packaged it with a protection layer after sandwiching it with electrodes. When a voltage is applied to the electrodes, the piezoelectric ceramics vibrates, and the viscoelastic polymer functions as a diaphragm.

The strain energy generated by bending the film by hand is released as heat, preventing cracks, peel-off, etc. In the audible range, the film keeps an internal loss appropriate for a diaphragm. The viscoelastic polymer was developed based on materials that Fujifilm developed in the past.